Income Taxes - Deferred Tax Asset of U.S. Consolidated Federal Income Tax Group (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Unrecognized tax benefits, if recognized would favorably affect the effective tax rate	$ 1,400	$ 1,400	$ 1,400
Unrecognized tax benefits, interest and penalties accrued	62	53	52
Accrued expense (benefit) for the payment of interest and penalties	$ 13	$ 1	$ (11)